Correctly enable recursive submodules in the Arduino compilation job

Author: lcapossio

.github/workflows/main.yml

@@ -30,6 +30,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install Arduino CLI
       uses: arduino/setup-arduino-cli@v2
     - name: Install platform